Wire-holder.



H. J. MITCHELL.

WIRE HOLDER.

APPLICATION FILED NOV. 21. 1915.

Patented Mar. 6, 1917.

HALSEY J. MITCHELL, 0F SCHENECTADY, NEW YORK.

WIRE-HOLDER.

Specification of Letters Patent.

Patented Mar. 6, 1917.

Application filed November 27, 1915. Serial No. 63,837.

To all whom it may concern:

Be it known that I, HALsnY J MITCHELL, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of-New York, have invented certain new and useful Improvements in VVire- Holders, of which the following is a specification.

My invention relates to wire holders, and more particularly to a wire holder adapted for use in connection with coil winding forms used for making armature coils and the like.

The primary object of my invention is to provide a wire holder for use with an armature coil form, which includes a holding or clamping jaw, an operating arm therefor, and locking means associated with said arm.

Another object of my invention is to provide a removable bearing surface for the clamping jaw so that renewal of the jaw as a whole is obviated.

lV-ith the above and other objects in view my invention resides preferably in the construction, combination, and arrangement of parts as hereinafter set forth in the specification and illustrated in the accompanying drawings, in which,

Figure 1 is a perspective view of a coil winding form showing my invention applied thereto.

Fig. 2 is a transverse sectional view of the coil winding form, supporting standard, op-

erating arm, and clamping jaw.

Similar reference characters indicate similar parts throughout the various views of the drawings.

In the drawings wherein the preferred embodiment of my invention is illustrated,

a coil winding form is designated 1, said form being provided with a marginal lateral flange 2. The form '1 is preferably hexagonal in shape and is tapered slightly on its opposite extremities as is common in coil winding forms used at the present time. The sides of the form 1 are inclined as indicated at 3 so as to facilitate the removal of the coil when wound about the form. Upstanding walls 4 are provided on the flange 2 for an obvious purpose, this structure being common in the art.

My improved holder includes a supporting bracket having spaced arms 5 formed integral with a base 5 mounted on the form 1. A block 6 having its upper edge toothed,

as at 6 is mounted between the arms 5 and prevented from accidental movement by means of a transversely extending screw 7. A clamping arm 8 is pivoted on a pin 9 passing through the arms 5 and is provided with a handle portion 9. A retaining pawl 10 is pivoted. on the arm 8 at the point 11 and is provided with a grip portion 12. A coil spring or the like 13 is interposed between the grip portion 12 and the handle 9 so as to normally maintain the pawl 10 in engagement with the teeth 6.

The holding or clamping jaw is provided which includes a block 14 being bifurcated to embrace the arm 8, as indicated at 15, said block being pivoted at 16 to said arm. A flat spring or the like 17 is secured at 18 to the handle 9 and bears against the block 14 for a purpose which will hereinafter appear.

A renewable wearing surface for the clamping jaw 14 is provided which includes a plate 19 having an aperture 20 through which a screw 21 passes, said screw being receivable in the clamping jaw 14, as shown to advantage in Fig. 2. The head of the screw 21 is preferably countersunk in the plate 19 as shown. A spacing or wedgin washer 22, slotted as at 23, is receivable etween the wearing plate 19 and the lower extremity of the block 14.

In the drawings I have illustrated three strands of wire, designated 24, and it will be noted that the holder is adapted to retain said strands on the form. It will be noted that should the clamping plate 19 become worn, the plate may be readily removed and another placed on the clamping jaw 14. In this manner time may be saved, since the grinding of the jaw 14 is obviated and the wearing surface thereof may be readily renewed. The pawl 10 is adapted to retain the arm 8 in the clamping position, and it will be noted that the spring 17 serves to maintain the clamping jaw 14in engagement with the wall 3 of the form 1 so as to prevent the strands of wire or the like from becoming displaced. Another advantage of the invention will be seen to reside in the fact that the strands are all maintained in the same plane, which is desirable when winding large coils where few turns or convolutions of wire are used. It will be readily apparent that should the teeth on the block 6 become worn or rendered useless the block may readily be removed and replaced with a new one.

From the above description taken in connection with the accompanying drawings, itis thought that a clear and comprehensive understanding of the construction, opera tion, and advantages of my invention may be readily gathered, and it is to be understood that while I have shown and described the invention as embodying a specified structure, I reserve the right to make such changes in the details thereof as are within the scope of the invention as claimed.

I claim:

1. A wire holder for coil forms, including, in combination with a coil form comprising a body having a lateral marginal flange, a standard on said body, a lever pivoted on said standard, a locking pawl on said lever, a clamping aw pivotally carried by said lever, and resilient means for maintaining said jaw in engagement with the walls of said body.

2. A wire holder for coil forms, including, in combination with a coil form comprising a body having a lateral marginal flange, a standard on said body, a lever pivot-ed on said standard, a clamping jaw pivoted on said lever, resilient means associated with said jaw, and a removable wearing surface Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. i

on said jaw, as and for the purpose set forth.

3. A wire holder for coil forms, including, in combination with a coil form comprising a body having a lateral marginal flange, a standard on said body, a lever associated with said standard, locking means therefor, a clamping on said lever, a wearing plate carried by said clamping jaw and detachably secured thereto, and a wedge plate interposed between said wearing plate and said clamping jaw, as and for the purpose set forth.

4. A wire holder for coil forms, including,

in combination with a coil form, a standard 

